[bugfix] delete interaction requests when deleting account (#4278)

Signed-off-by: nicole mikołajczyk <git@mkljczk.pl>

# Description

I recently noticed that pending interaction requests don't disappear on domain suspension.

## Checklist

- [x] I/we have read the [GoToSocial contribution guidelines](https://codeberg.org/superseriousbusiness/gotosocial/src/branch/main/CONTRIBUTING.md).
- [ ] I/we have discussed the proposed changes already, either in an issue on the repository, or in the Matrix chat.
- [x] I/we have not leveraged AI to create the proposed changes.
- [x] I/we have performed a self-review of added code.
- [x] I/we have written code that is legible and maintainable by others.
- [x] I/we have commented the added code, particularly in hard-to-understand areas.
- [ ] I/we have made any necessary changes to documentation.
- [ ] I/we have added tests that cover new code.
- [x] I/we have run tests and they pass locally with the changes.
- [x] I/we have run `go fmt ./...` and `golangci-lint run`.

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4278
Co-authored-by: nicole mikołajczyk <git@mkljczk.pl>
Co-committed-by: nicole mikołajczyk <git@mkljczk.pl>

internal/processing/account/delete.go

@@ -478,6 +478,12 @@ func (p *Processor) deleteAccountPeripheral(
 	err != nil && !errors.Is(err, db.ErrNoEntries) {
 		log.Errorf("error deleting poll votes by account: %v", err)
 	}
+
+	// Delete all interaction requests from given account, local and remote.
+	if err := p.state.DB.DeleteInteractionRequestsByInteractingAccountID(ctx, account.ID); // nocollapse
+	err != nil && !errors.Is(err, db.ErrNoEntries) {
+		log.Errorf("error deleting interaction requests by account: %v", err)
+	}
 }
 
 // processSideEffect will process the given side effect details,